Detection of Borrowing
Loanwords can severely affect the topology of a tree so efforts are made to exclude borrowings. However, undetected ones sometimes still exist. McMahon and McMahon showed that around 5% borrowing can affect the topology while 10% has significant effects. In networks borrowing produces reticulations. Minett and Wang examined ways of detecting borrowing automatically.
Read more about this topic: Quantitative Comparative Linguistics
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